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Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
引用自: https://n.yam.com/Article/20240521359596
The Log Periodic Antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies.
Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas.
The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
東京2024年5月21日 /美通社/ -- 卡西歐計算機株式會社(Casio Computer Co., Ltd)今天宣布推出五款全新「Sky and Sea」（天空大海）表款，涵蓋旗下五個手表品牌 -- Casiotron、G-SHOCK、EDIFICE、PRO TREK和BABY-G，以此紀念卡西歐手表誕生50周年。設計主題以藍色和金色為主色調，讓人聯想到照亮天空和大海的耀眼光芒。
卡西歐於1974年推出Casiotron QW02，從此進入鍾表業。作為世界上第一款帶有自動日歷功能的數字手表，Casiotron以全自動腕表的概念為基礎，不僅能顯示小時、分鍾和秒鍾，還能准確顯示月份、日期和星期。有了如此此驕人的開端，卡西歐秉承對實用性的追求，不斷推出先進的功能，包括標准時間無線電波接收、Mobile Link連接和太陽能充電等功能，同時還開發了與眾不同的鍾表品牌，以滿足不同的生活方式需求。
卡西歐以「Sky and Sea」為理念，推出了五個品牌的新款手表，以此紀念卡西歐手表誕生50周年。每款新表都基於卡西歐領先品牌中一款廣受歡迎的設計，它們都有一個共同的設計主題，以藍色和金色為主色調，讓人聯想到海天一色、流光溢彩的景象。這是卡西歐首次以共同的主題推出五個不同品牌的手表。
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)「Sky and Sea」的設計主題令人聯想到寬廣無垠但又變化萬千的天空與大海，表達了卡西歐在公司最初的全自動腕表概念基礎上不斷創新的承諾。
所有五款腕表均采用了環保設計，包括可將太陽光和熒光燈轉化為能量為所有腕表功能供電的Tough Solar充電系統，以及使用可回收材料制成的特殊包裝。
引用自: https://n.yam.com/Article/20240521359596
The Log Periodic Antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies.
Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas.
The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
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